Physics, 23.07.2021 15:10 denvontgekingice

Câu 1: Một khẩu súng có khối lượng 4kg bắn ra viên đạn có khối lượng 20g, vận tốc của đạn khi ra khỏi nòng súng là 600m/s thì vận tốc giật lùi của súng là: A. 3 cm/s. B. 12 cm/s. C. 3 m/s. D. 12 m/s.

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Câu 1: Một khẩu súng có khối lượng 4kg bắn ra viên đạn có khối lượng 20g, vận tốc của đạn khi ra khỏ...

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